نتایج جستجو برای: total horizontal derivative of the tilt angle thdr
تعداد نتایج: 22834165 فیلتر نتایج به سال:
potential field images obtained in potential field data measurements are suitable tools for mineral and hydrocarbons resources explorations. these images consist of different anomalies which in many cases are contaminated with noise. the horizontal location of the boundaries of potential field anomaly sources is of interest in potential field interpretation. however, the edge of potential field...
Horizontal directional derivatives and sunshading are two commonly used gradient-based filters for enhancing linear features in potential field data. The Tilt angle is a useful filter that produces an amplitude-balanced vertical derivative. The disadvantage of the Tilt angle-based filters is that they require the computation of the vertical derivative of the data, which as well as making the fi...
Noise cancelation is the process done to remove out-of-range anomalies and make better edge boundaries interpretation. One of most challenging issues in describing gravitational maps separating related shallow sources from deep ones. Furthermore, Existing noise can it arduous separate blurred boundaries. In this study SE Iran, surveying was carried out areas west Qeshm Hormuz islands a regular ...
This study aims to determine Curie point depth (CPD), Heat flow and the boundaries of geological structures Cyprus Island using EMAG2 magnetic data. CPD values were calculated by applying spectral analysis technique anomaly map divided into 60 blocks (60x60 km2). Then, different thermal conductivity (K=1, 1.5 2.5 Wm–1 K–1) heat values. ranged from 12.4 km 28.18 km, between 20 50 mW/m2 for K=1. ...
nowadays two important discussions in academic parties all over the world are energy crisis and environment crisis. one of the strategies to deal with these crisises is using clean, renewable and domestic energy sources. one of the best renewable energies that can be used in different scales is solar energy. in iran which is considered among the greatest countries that receive huge amount of so...
due to the limiting workspace of parallel manipulator and regarding to finding the trajectory planning of singularity free at workspace is difficult, so finding a best solution that can develop a technique to determine the singularity-free zones in the workspace of parallel manipulators is highly important. in this thesis a simple and new technique are presented to determine the maximal singula...
data envelopment analysis (dea) is a powerful tool for measuring relative efficiency of organizational units referred to as decision making units (dmus). in most cases dmus have network structures with internal linking activities. traditional dea models, however, consider dmus as black boxes with no regard to their linking activities and therefore do not provide decision makers with the reasons...
abstract the use of geophysical methods, before digging, can be effective in the archaeological explorations. in the meantime, the gravimetery is the one of the most widely methods that be use, due to lack of harmful environmental effects. the gravity method is based on density contrast between the anomalous body and the country rocks or around of them. for archeology studying, the target is de...
This paper describes an edge detection method based on surface-derived attributes. The surface-derived attributes are widely used in the interpretation ofseismic datain two main categories: (1) derivative attributes including the dip angle and the azimuth; (2) derivative attributes including curvature attributes. In general, the magnitude of the normal curvature of a surface (curvature attri...
magnetic survey is nowadays the most efficient non-destructive geophysical method. this technique puts emphasis on the measurement of anomalies of the earth’s magnetic field, caused by the presence of archaeological remains in the ground. magnetic survey is one of the oldest geophysical methods for airborne and land use. that is why there is a large volume of data that could be used for geologi...
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